Load Cell Healthiness Checks
A load cell is a device that is used to measure weight or force. W hen a force is applied to it in a specific manner, a load cell produces…
Types of Thermocouples
The most common types of thermocouples are the Type B, E, J, K, N, R, S, T, C, & P. Before choosing the type of thermocouple for your process, make…
Bently Nevada Vibration Probes Functional Testing
Bently Nevada Vibration Probes Functional Testing Objective : To check the characteristics and healthiness of vibration probes ( make : Bently Nevada ) Principle: Proximity transducers use Eddy Current principle to…
Motor Operated Valve Functional Testing
ELECTRIC MOTOR VALVE ACTUATOR FUNCTION TEST Test Equipment Required :- 415 Volt Supply Multimeter Clamp-on Meter Megger Tester Typical Test Set-up Functional Test Procedure a. Check motor spec as per…
4-wire Passive versus Active Transmitters
4-wire “passive” versus “active” output transmitters Some self-powered (4-wire) analog electronic transmitters are designed to behave as electrical loads rather than as electrical sources. Such transmitters are commonly referred to…
2-wire Transmitters Current Loops
2-wire (“loop-powered”) transmitter current loops It is possible to convey electrical power and communicate analog information over the same two wires using 4 to 20 milliamps DC, if we design…
4-wire Transmitters Current Loops
4-wire (“self-powered”) Transmitter current loops DC electric current signals may also be used to communicate process measurement information from transmitters to controllers (PLC/DCS), indicators, recorders, alarms, and other input devices.…
Self Actuated Pressure Control Valve Functional Testing
SELF ACTUATED PRESSURE CONTROL VALVE FUNCTIONAL TESTING 1) Pressure Reducing Method Test Equipment Required :- Regulator Test Gauge Typical Test Set-up Functional Testing Procedure a. Check instrument data, check for…
Thermocouples Green Rot Effect
Thermocouples Green Rot Effect Type "K" thermocouples are widely used for temperature measurement and control up to about 2000 Deg F. They operate very well in oxidizing atmospheres. However, if…
DCS Controllers to Output Current Loops
The simplest form of 4-20 mA current loop is the type used to represent the output of a process controller, sending a command signal to a final control element. Here,…
